Now that Chromium is switched to ANGLE's new Platform tracing methods, we can junk the old APIs. BUG=angleproject:966 BUG=436191 Change-Id: Ie2564eed9e5ce4604e0dcd4582618e7467b2d590 Reviewed-on: https://chromium-review.googlesource.com/264934Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org>
